The mangle was mechanical laundry aid consisting of two rollers in a sturdy frame, connected by cogs and powered by a hand crank or electrically. It was usually used to wring water from wet laundry.
Throughout the first two decades of the Beezer (the 50’s and 60’s) this was a common place household item and as such the source of numerous comic strip gags.
Here we see Boss of the Badd Lads (Beezer March 1969) instructing a pupil on how to forge notes with the help of ink and an old mangle.
Gradually, the electric washing machine rendered this use of a mangle obsolete,
and with it the need to wring clothes mechanically, which no doubt was a relief to Baby Crockett's Mum as she no longer had to worry about him getting caught up in it (from the Beezer Book 1970).